What are potential pitfalls to avoid when using PHP functions like strtotime() and mysql_fetch_array() for data manipulation in graph generation?

One potential pitfall when using functions like strtotime() and mysql_fetch_array() for data manipulation in graph generation is the risk of encountering deprecated or insecure functions. To avoid this, it's important to use up-to-date functions and methods to ensure the security and stability of your code. Additionally, always sanitize and validate user input to prevent SQL injection attacks. 

// Example of using mysqli_fetch_array() instead of mysql_fetch_array() for improved security
$result = mysqli_query($connection, "SELECT * FROM table");
while ($row = mysqli_fetch_array($result)) {
    // Data manipulation and graph generation logic here
}

Keywords

strtotime mysql_fetch_array data manipulation graph generation pitfalls

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